Explained: Iran’s nuclear program as its atomic deal with world powers unravels

Here's where the deal now stands and what Tehran has done to ramp-up its atomic program.

Ali Akbar Salehi, director of Iran’s nuclear energy agency speaks during a news conference with the acting head of the U.N. nuclear watchdog (IAEA), Cornel Feruta, in Tehran, Iran September 8, 2019. PR of IAEO (Iran’s Atomic Energy Organization)/WANA (West Asia News Agency) via REUTERS

Iran announced Tuesday it would inject uranium gas into 1,044 centrifuges that had previously been kept empty under its 2015 nuclear deal with world powers.